PAGAN
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Category | Contaminant modelling |
Platform | DOS |
Status | Public domain |
Description | PAGAN is a part of the performance assessment methodology developed for use by the U.S. Nuclear Regulatory Commission in evaluating license applications for low-level waste disposal facilities. The program is used as one candidate approach for analysis of the ground-water pathway. It has the capability to model the source term, vadose-zone transport, and aquifer transport of radionuclides from a waste disposal unit. It combines the two codes SURFACE and DISPERSE which are used as semi-analytical solutions to the convective-dispersion equation. This system uses menu driven input/out for implementing a simple ground-water transport analysis and incorporates statistical uncertainty functions for handling data uncertainties. The output includes a time- and location-dependent radionuclide concentration at a well in the aquifer, or time- and location-dependent radionuclide flux into a surface-water body. It uses a simple modeling approach to which the convective-dispersion equation is applied. The model for releases from a disposal unit is based on a cascade mixing cells including leach mechanisms that can be used to analyze either surface contaminated wastes or diffusion controlled releases. |
Data formats supported | None stated |
Supplier in France | OECD Nuclear Energy Agency |
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